I can’t decide _____.
| A．to buy which one | B．which one to buy |
| C．to buy which | D．which to buy one |
We never doubt __________Bill is honest. Because he never tell lies.
| A．that | B．if | C．whether | D．that if |
Water, air and sunshine are __________great importance ____living things．
| A．in; on | B．in; to | C．of; on | D．of; to |
---Thank you, Mille and Kitty. It was kind of you to help me with my lessons.
---- _________.
| A．With pleasure. | B．Better not. | C．Of course not | D．It’s our pleasure. |
--Mr. Wu, please _____ how much time you need to finish your homework.
-- All right. I’ll make it(做到) at once.
| A．work out | B．find out | C．give out | D．put out |
--Sorry, sir. I made a mistake again.
--_________. Practice more and you will do better.
| A．Never mind | B．I'm not sure |
| C．You're welcome | D．Don't mention it |